This is a template attribute. Template attributes can be used in filtering, or to retrieve data from the model to use in drawings and reports. For example, when you create a report, Tekla Structures replaces the attributes added in the report template with the corresponding object property values.
You can use the template attributes ORIGIN_X, ORIGIN_Y, and ORIGIN_Z to show the global
coordinates of a connection's origin.
Adding _BASEPOINT at
the end of the attribute gives coordinates relative to the base point selected in
the view, and adding _PROJECT at the end gives coordinates relative to the base
point selected as the project base point. _BASEPOINT
uses the current base point in the same way as the workplane uses the current
workplane: If there is no current base point defined, _BASEPOINT
provides values relative to model origin (Global).